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Title: Atmospheric Dispersion Of Emissions From Compressor Stations
Author: m. Dean High
Source: American Gas Association 1979
Year Published: 1979
Abstract: To aid in the prediction of groundlevel concentrations from a given facility, the EPA and other research groups have developed mathematical models which typify the plume behavior once it leaves the stack. The X, Y and Z axis are illustrated (Figure 1) for a typical plume released from an elevated stack. As i.s true in all fields, the models work best for rather simplistic situations (i.e., fiat terrain, steady-state meteorological conditions). For dispersion modeling, the accuracy becomes questionable when weather conditions (like windspeed or wind direction) are highly variable or when buildings or rough terrain create turbulence thereby affecting the plume. Weather variabiliiy likewise makes longer term predictions more difficult than an instantaneous prediction which assumes steady slate emission rates, steady state weather conditions, and flat terrain.

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